Uttarakhand Board Class 10 Question Paper 2024 for Science

UTTRAKHAND BOARD

Question Paper

dHri. gfi" gs} al ri@II , s
Rol! No. No. of printed pages : I

CI33 23,g {rrrJ}
2A24
Aunq (ffi.rol
scrENcE {THEORY}
gIfQ:3queI 1ffi:
Marks :
80
Time: 3 Hours l I Max. 8O"

H'dsr, (i) f,fl uwT-qri d gf, 30 swi dt sS wq 3TfuErd f;t
Directions: There are in all 30 questions in this question paper. All questions are
compulsory.
qq=ii t{ frefRa 3i6 sib HETq stfua dl
Marks allotted to the questions are mentioned against them.
(iii) rd6 qs{ d €qFr[do. frd ae]T H{fra rirc frfrut
Read each question carefully and answer to the point.
(iv) qs{ sqr t vgffio ss{ dt {fl sw & e-d-6 qus b rtr fr uK fumm"
t
fr& ,ru dt s& Ftrq 3iqi} rd-{gk-6r C frfuet qqq v@T z g iln FrRrm
5A{RT req dr
Question No. 1 is multiple choice question. Four options are given in
answer of each part of this question. Write correct option in your
answer book. Question No. 2 to 9 are definite answer type questions.
t
(v) qs{ s@T I 6-r rd6 qus uir ro mr tt qq{ dlgr z g dcr urr 3i6 &
es{ dt esq qsr 10 15 ffiF d 3i6 b qq{ dt ss{ TiqmT 16 S 2G d-do *q
t
3i6 b qsq dt qr{ srqr 24 * 30 atr qK 3i6 b qT{ dt
Each part of question No, 1 carries one mark. Question No. 2 to 9
are of one mark each. Question No. 10 to 15 are of two marks
each. Question No. 16 to 23 are of three marks each. Question No"
24 to 30 are of four marks each.
(vi) {fl qwr-w{ d inrrq q{ 6t$ F{drcq =r& t Hpnfr 6frwq qsiiC aTidRffi km--iq
q-drE foql rrqT dt t't es{i ii bE-d w fuos m-r fi rcE fiBul

There is no ovenall choice in this question pape[ howeveq an internal
choice has been provided in few questions. Attempt only one of the
given choices in such questions.

tlI I P.r.o.

1. (6) uelr tsnolfro qtr c2H6 ) it ra**a-o; siliieT d -
1

Ethane (morecurar formura c2H6) has covarent bonds-
(i) 6 (ii) 7
(iii) B (iv) e
(s) frq srmA* d srurqo q<ref t -
1

The oxidising agent in the following reaction is_
CuC(s) + Hr(g) _+ Cu(s) + HrO(t)
(i) Cuo(s) (ii) H,(g)
(iii) Cu(s) (iv) HrO(l)
(q) 3{tlrl6I stlEIR 6r+ b frs frq d t fuH rox fr silqg m.r sqfrrr
*m te 1

(i) uffiftm (ii) ffirRffi
(iii) trdfus (iv) b#fr6
which one of the following types of medicines is used for treating
indigestion?
(i) Antibiotic ( ii) Analgesic
(iii) Antacid (iv) Antiseptic
(E) q-qq fr sr{f,q mi mrd
d- 1

(i) trr 6r T6H ( ii) rtrffi6Tag
(iii) 3rsdr 3rET 6r rf,q (iv) strffiforq6'rag
The function of Xylem in plants is_
(i) Transport of water ( ii) Transport of food
(iii) Transport of amino acid (iv) Transport of oxygen
(5) qmd srft{ t fra 6'r qrsmErr drdr t- 1

(i) srt;rprq ti (ii) fr.f,Frq ii
(iii) u{ f (iv) qRas ii
Bile is stored in human body in-
(i) Pancreas ( ii) Gallbladder
(iii) Kidney (iv) Brain

233 (t-trJ) 12tr

(e.) qfupl it frgo sitaqr b nqro o1e< 6166t d- 1

(i) sfrtteT ( ii) ffin
(iii) s.frf riflur (iv) fugd €rrr
Rate of flow of electric charge in the circuit is called-
(i) Resistance (ii) Voltage
(iii) Energy flow (iv) Electric current
(s) fuxft s.rs drn fr qrrt-m zo tt W-e stmg dr fr'ft- 1

The power of a convex lens is 2D. Its focal length will be-
(i) 20 cm (ii) 40 cm
(iii) 50 cm (iv) 10 cm
(H) Frqfrbo fr t 6t{ siIex-Trf,flr or Frqfur ort da 1

(i) uru", t{, uru (ii) srg, il6-fi, OR
(iii) ssti, 6lfr
rTr-q, (iv) srtr, sgfr, sst
Which of the following constitute a food chain -
(i) Grass, Wheat, Mango (ii) Grass, Goat, Lion
(iii) Goat, Cow, Elephant (iv) Grass, Fish, Goat
z. Js 3T€Ig 6I qrq d q-&-d frRsd ril Hrorq aFI q{ rd 3i-{efi fr vr$ srft tt 1

Write the name and symbol of a non-metal that exists in liquid state at norrnal
temperature.

3. Ew. 6r6-ffiik6 d-s, qw hdqs tw b rrr 61wit qfi ser& tl 1

Why does dry hydrochloric gas not chanEe the colour of the dry litmus paper?

4. wrh&qad"rfi frrerTknl2otfi. dr rs+tsto,s6trord'fte 1

The radius of curvature of a spherical mirror is 20 cm. What will be its focal
length?

s. ss d{q6r qlq snr$E ;il ffi ilq 6T fi€Ir 3fu e"g-r qftfuq tm tr 1

Name a mirror that gives an erect and enlarged image of an object.

6. s6iqITidwT*F-q6-l{rflqFffivfto-qplftRsst 1

Write chemical equation of photosynthesis process.

7. kgd ffi b n'gefr b Fmfur tiqro'drnfi or fi n*q 6ifuor anr te 1

Why is the tungston almost used as a filament of electric bulb?

233 (HrJ) t3I I P.T.O.

8' F nq qfrqel d fr-€3n b frq fr'+rqT<{ rTrqt b frru at-e,+c. o1fuH s6'R qq}Hd
C
dl
fiffir arcr 1

Flow is a voltmeter connected in the electric circuit to measure the potential
difference between two points?
9. 3mq q-{d'b 3Tir&Tq b fru m'hq'RT RHr{Fr gwfl: sf,=ar?ft qFTr rqr t? .l

Which chemical is mainly considered responsible for the depletion of ozone layer?

10. errfr{ r*sT mr rreiqfr-6 qx E d ilutry frfuui 2
write the chemical formula and two uses of the washing soda.
11. (6) 3{elrgdi, 3ll-d#fl{ &'srer HTfrD d6T ib-flr 3f-dgr5s 6.qr& di 1
What type of oxides are formeo, ivhen non-metals combine with oxygen?
(q) 3Trqfi-6 dmi 6r qrqrdr s6 ffii 6iET E? 1
Why do ionic compounds have high melting point?

L2- 3aqb qIH dft-d-qq A f,sIT a f;f frreqi' A 6T pH{6 o darT kflfi B q5r pH qH 8
tf fus
frEqq q arf*t* s{r{Fr ol trr<ar 3Tfti-dr 6? ${t * 6h rrT sttfoq d azn otq HT{etql

You have two solutions A & B. The pH value of solution A is 6
and pH uu,r" o',
solution B is 8. Which solution has more hydroEen ion concentration? Which
one
of this is acidic & which one is basic?

13. GrEosq", dEqur{ + frrfl *s frrq f,l Z
How does binary fission differ from murtipre fission?

L4. H-q{rIItII ud cr<-q-{rrM * mr s+ftmq *e 2
what is meant by self-pollination and cross-poliination?
1s . F6-d EffiE @T d? sHS kdTiuT b fts fus erox b drs mr sqdrr fuql oror tl 2
what is Myopia? what type of lens is used for correcting it?
16. (') FW+ $ t*mFil{q Grn frq c,trdt mT ftqfq RT|EE - z
Show the formation of the following compounds by the transfer of
electrons-
(i) Na.O (ii) MEC|,
(qq) cH43Tql6t tdffi{ frg dqoqr srT$ut 1

Draw the erectron dot structure of cHo morecure.

233 (HrJ) 147

t7, (6) ftqfrfu,il mi_dfro.
dftmi or IUPAC Trqioq btHs-
Give the IUPAC name 2
of the following
compounds_
o
(i) tt
CH:
-CHz - U- oH

(ii) cHs - tl- cH,
o
(u) i;-fi d snqrq
rrr) s&e b ft-dqr s srsi q-{
E}i arfr iTsrqtr' 3TnrDrqT
reaction takes prace, ftfur,r 1
[:.(",:iil:;ff: when zinc is added
ro a sorution or

3IeIt1YsP
(6-) 3nsfud R_ir
fu{d 6T urf,m.ffifi q_&
dtrr, E_d*.oqf d-m r}m
why does distilied ivater
not conduct erectricity,
de 2
(qt uerfr-m * saHh6 whereas rain water
3TB d ffiq u,) 3fuk srFTB"T # # does?
why is the conversion
of ethanol to ethanoic t, 1
18. (6) ffi arfir C q_€T acid an oxidation reaction?
6-r qrTrq 6Ef, 3fu
fu" ,"" elai de
where and how does Z
the digestion of fat
(s) 6Thd qquq ERr -,Trd takes prace in our body?

Write ti
sr+ dd d) qt€f b; frHr
; -1H# -H'# ffi?ffi,ffi,_ffi
1

1e q'd str$q
;*
diasram of Human
ilffir::}ri::,ciean Excretory system .^:'ffi;:
(i) rffi
(ii) {ndrF+ (iii) Tflvrq
Kidney
Ureter
bradder
qrqd
6"o 6-r wq, fra o*.+ -* m ?Trr) d rd*id #
a neat and crean diagram
of Human Heart and
,::"* raber the forowing
parts in
(,) qrctr sTfu.d (,i) orctr6
Right atrium (iii) Fdr€rq+
Left ventricle
Aorta
233 (HrJ)
IsI
I P.r.o.
I

I

20. (s) qrcr e1ffi fu drt ffi ft;qfrql-fi dr 1

Explain why do stars twinkle?
(q) wo 3ilcrrsT 6'r qII +f,r ddi fur Ai 1

Why the colour of a clear sky is blue?
(rr) +r fr1q+is{ &Frar S rci sftrsT-q *e 1

What is rvreant by power of accornmodation of the eye?
21.. (m) fuga ry-d tsTfui m\ qRqTBc #ffi
n?lT Ssffir s.I. qri6 ftTfd t z
Define electric power and write its S.I. unit.
(s) ai(r Eqeto &t{ tuTtt 16 6tTt 6} qftrd}n ddiffit o<fi dl 1

Why don't two rnagnetic field lines intersect each other?
z.z. u6 Erd b cs d sv dsTT s00 mn siBd tt nra ffi}ffi" 1x3-3
A torch bulb is rated 5V & 500 mA. Calculate the follouring-
(i) qN 6r sfttfq
Resistance of bulb
(ii) q6'et sfu
Power of bulb
(iii) E6 Eit sf,rt Erd ffir 6r(1 3IItr s#
Energy cc,nsumed by bulb when it is lighted one hour.
zz. (6) 3ffi{ dw * deiT q6 ffi
qr-ftT.l dn fuH q=6R ssilfufr msfi te 2
What is ozone and how does it affect any ecosysten'l?
(Eq) d-q 3Trd€JE wr *? 1

What is Biological Magnification?
3Tgltil/CIR

Diagramatically describe the flow of energy in an ecosystem.
(q) ffin &r qfr 6q Lr6 q\fr w< b ffift Sql m) vrlrq 6{ d? 1

What will happen if we kill all the organisms in one tropic level?
24. (s) fuS qflpf 'x' b futrqE mr sq-qlrT sffi
6{t & fu a\nr tl
A solution of substance 'X' is used for white washing.
(i)sdref 'x' 6r qrrT q qr frfudt 1

Write the name and formula of substance 'X'.
(ii) qET$ 'x' d am & erer 3inTfrqT 6-r H'frslTr frffit 1

Write the equation of the reaction of substance 'X' with water.
(ut sqv41q aer wrEh$ srfiItsqT &-T ffit s+eJ *a sdrf,{ul rTRa vqflrSd z I
\{/hat is meant by Exothermic and Endotherrnic reactions? Explain with
example.
233(HrJ) t6I

I

2s. @T *dT d;rq tbEm TTHRTF{6 s+6wr frffi1 _
Lx4=4
What happens when (Write only chemical equation) _
(i) ql b ql+ C ffidq er$snmrw +n q-drk d snft *r I

carbon dioxide gas is passed in rime water sorution
(ii) k{ffi qyf 6t al agfraa}Ro 3rE *. bzTr 6} arfr tr
Bleaching powder reacts with dirute hydrochroric acid.
(iii) sP)frn frt bqr rilfuq erc + di dffi
ti
Ethanol reacts with Sodium metal
(iv) u*ilf,o'srftT fi effi-d + bqT fi ar& tr
Ethanoic acid reacts with ethanol.
3[EErr/oR.
(6) furdotqfrt+rqrfrffi -
2
Define the following terms _
(i) lgfu (ii) 3ET€D
Mineral Ore
(q) *^ergg) & ilq ea-rSA s) rq srm * eTf,frffi fu€nfrd
q6}mavmfidr v - \n dr&
\\rr d ,YI d
\r aen q' €tr{U
', Eil irsr
2
Name the two metals which displace hydrogen from
dilute acid and two
metals which can not dr: this.
26 (6) ftTET dr dH rratrRer ffi
b qrq frTfrTdr 1
Name any trvo sexually transmitted diseases
,*, r* s{rqrelq fr srm dqp6-r @T d? 1
What is the role of acid in our stomach?
(rr) sa-dg qFu * vrfrd rrlilq 6r qFr frMt 1
write the name of hormone secreted from thyroid grand,
(q) qgfd b gu rifui fi frfuNT ngfrr;
rfu,. f,6r ffii o1arfi *a
Why are some patients of diabetes treated by giving
1
injection of insutin?
27. (6) ks# ssrc t gmr<r qH b fu qraq B=T ffi d# +
or -"a Z
what are the methods used by plants to get rid of excretory products?
t
(s) t-$n edlrh + t*
kil ftrr fr frFj=r -* ** t#+d dl
sq drt 2
How do Mendel's experiments show that traits
28. (6) ftFEt d Edqdib ilq Hplr 6rd frfur -
are inherited independently?
2
Give the narne and functions of any two enzymes.
(st r'*aifrim u.i dg6\er6 #di bl srq q6fr fr oqr 3rtr{
How ane the modes for reproduction different
d? z
in unicellular and multicellular
organisms?
aer.rTloR
233 (HrJ)
17 j t p.r.o.

(6) 'mrrsr bt fur c qrcq d g1hqT a}fr *r'fua Htrd srrflr$ur 3
'Plant response in the direction of light'. Explain with figure.
(st rwifrfi o frqrqffi { mr sr.r< ta 1

what is the difference between Autotroph and Heterotroph?
zs. s fr*. 3{kFK *q ,s tfr. d-6$ {fi b s,ft* dq * ro frfi. fi -*t.n 16 dr
fl
sftrfrB fr furfr, r-Ffr den 3r6-R aro fihtt 4
An object 3 cm in size is placed 10 cm in front of a concave mirror of focal
length 15 cm Find the position, nature and size of the image forrned.

(o) tu1rT 3IItq d sa-tral u *#ff*Tfr,- sq t qrfr ti
ssr$,r$ {km qift et
Ef mir#d Sft tr
trrn6 T{ gfr
2
Explain with the help of a diagrarn why a pencil partly immersed in water
appears to be bent at the water surface?
(s) +2.sD deII -1.sD srrrdl b d ds q-{sx ssffi tt rd q-& flr ilr guilin of aq61
d?rr nTtr il-s 6t $t6T qft wr ehtl Z
Two lenses of power +2.5D and -1.5D are piaced in contact with each
other. What will be the power and focal length of this combination?
30. (6) fit ftd qd qRqer 3ilts d ryrqT 6tH- 7Yz+L1/z=3
In the given circuit diagram, calcuiate-
(i) qRqq 6T gm qfu$Er
The total resistance of the circuit
(ii) qRqpr d rdrtrd gar frgn wr
The total current flowing in the clrcuit

Y

15C)

1

/

a
rl
t2v
(qq) fufr qnr6 mr sftrfti fuq o-rEdt q{ frft mror *l 1

What are the factors on which the resistance of a conductor depends?
*****
233 (HrJ) t8I

tl

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